Detailed Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 
Q: [header] How to use echofon [title] Go to the website and install the plugin. [step] Once you have done this, you will have to restart firefox. [title] Set up echofon. <sep> (A) [step] Click on the gray icon to get to the echofon setup screen. [title] Enter in your twitter account username and password to link echofon to your twitter account. (B) [step] To start the program, start from the appropriate location on your firefox window. Go to the tab which's placed in the far left hand corner of the window and select go to application. (C) [step] Go to the search box and enter the address and password. Hit enter once, and wait while the install program is installed. (D) [step] On the left side of the window you can see the usb audio receiver. To choose, click in the image to go to the microphone area, go to the audio pad, click " input, " click " audio, " then " input.
A:
A